Yes, here is the changes for 3.5.4 version:
1. Store Cart improvements.
This is the most important improvement in this version. So now with Store Cart function, you can choose schedule to hold the customer's cart data. There was a small issue when store cart data from previous version and it is also fixed now.
You can read more about Store Cart feature here:
eshopdocs.joomservices.com/advanced-features/store-cart
2. Some other improvements:
- Add the configuration option: Show Availability per product.
- Add configuration option to show/hide the base price exclude tax.
- Orders Manager adjustment.
- Auto hide Notify me button and Availability for non-inventory products
- Exports Order Improvement: Add Order Date field to export XML
So please upgrade EShop to the latest version 3.5.4 to have these new improvements.